Leather dye



Patented Jan. 20, 1931 iaaasis UNITED STATES PATENT oFFl-cau LYNN A.WATT, OF WEBSTER GROVES, MISSOURI. ASSIGNOB TO HOITSANTO CHEMICAL WORKS,OF ST. LOUIS, HISSOUBI, CORPORATION 01' MISSOURI LEATHER DYE Io Drawing.Application filed Kay 7,

This invention relates to leather dyes of the kind that are used fordyeing shoes. 7

The conventional shoe dye contains aniline or n'itrobenzene, which isused principally as a penetrant or vehicle to carry the dye solutionthrough the finish of the leather into the pores of the leather. Thesesubstances are highly toxic, and many cases of aniline or nitrobenzeneoisoning, resulting in se- 10 vere illness and eath, have been traceddirectl to the ractice of dyeing shoes while on t e fect of a person andthe practice of wearing shoes within a few hours after they have beendyed with a dye containing aniline 5 or nitrobenzene.

The main object of my invention is to provide a non-toxic leather dyethat can be used with perfect safety for dyeing shoes while the are on apersons feet.

nother object is to provide an efficient, non-poisonous shoe dye thatcan be manufactured at a low cost.

To this end I have devised a leather'dye, particularly adapted for usein dyeing shoes, which is distinguished from conventional shoe dyes, inthat a non-toxic substance is used as the penetrant or vehicle to carrythe dye solution into the ores of the leather.

I have found that-t e dichlorbenzenes are 10 well adapted for thispurpose, the substance that I dye soiiition consisting oforthodichlo'rbenzene'or orthodichlorbenzene containing someparadichlorbenzene. When a mixture of said substances is used it ispreferable to havethe orthodiehlorbenzene predominate in the Inadditiorto heir! of the kind mentione areeasy to obtain and are relativelyinexpensive, as either orthodichlorbenzene ororthbdichlorbenzene'containing some paradichlorbenzene, are produced inthe manufacture ofmonochlorbenzene, an

intermediate chemical, or paradichlorbenzene, an important insecticide.No adequate market for the ortho isomer alone or conrefer to useasthellpenetrant for the non-toxic, substances 1927. Serial no. mans.

used as the penetra-nt or vehicle of shoe dyes.

departing from the spirit of my invention.

The following is one formula that may be used'to produce my improved,non-toxic leather (1 e: v -0rthod ic hlorbenzene, approximately 30.0

grams;

.Spirit soluble nigrosine, approximately 7.5 grams;

Red oil (oleic acid), approximately 5.0

grams Denatured'e thyl alcohol, su flicient to make, approximately 100.0cc.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent is; 1

1. A leather dye composition containing a dichlorbenzene capable ofcarrying a. dye solution into the pores of the leather.

2. A leather dye composition including, as

one of its constituents, orthodichlorbenzene. 3. A composition. for thetreatment of leather containing a leather dye material and at least onedichlorbenz'ene. 4. A leather dye composed of the following ingredientsmixed in approximately the p'roqtainin some residualparadichlorbenzenehas exist e and it istherefore available as a byproduct at prices comparable with or lower L3 than the aniline ornitrobenzene heretofore portions specified: 1 -.Orthodichlorbenzene 30.0grams Spirit soluble nigrosine 7.5 grams Red oil (oleic acid) 4 5.0grams Denatured ethyl alcohol s'ufiil Y cient to make 1000- cc. I LYNNA.WATT.

